|Position|Club|Played|Points|Wins|Draws|Losses|Goals for|Goals against|Goal Difference|
|---|---|---|---|---|---|---|---|---|---|
|1|UE Lleida|38|57+19|23|11|4|56|20|+36|
|2|Real Valladolid|38|52+14|20|12|6|50|30|+20|
|3|Racing de Santander|38|52+14|23|6|9|56|38|+18|
|4|RCD Mallorca|38|50+12|21|8|9|57|34|+23|
|5|Real Betis|38|43+5|16|11|11|49|33|+16|
|6|Real Madrid B|38|42+4|15|12|11|57|41|+16|
|7|Atlético Marbella|38|42+4|17|8|13|45|41|+4|
|8|Barcelona B|38|39+1|15|9|14|59|55|+4|
|9|CP Mérida|38|39+1|13|13|12|43|42|+1|
|10|CD Castellón|38|36-2|13|10|15|40|45|-5|
|11|CD Badajoz|38|36-2|14|8|16|37|36|+1|
|12|SD Compostela|38|35-3|10|15|13|35|39|-4|
|13|Villarreal CF|38|34-4|13|8|17|38|51|-14|
|14|Palamós CF|38|33-5|12|9|17|33|50|-17|
|15|Athletic de Bilbao B|38|33-5|9|15|14|33|34|-1|
|16|SD Eibar|38|32-6|10|12|16|33|44|-11|
|17|UE Figueres|38|32-6|11|10|17|41|59|-18|
|18|CD Lugo|38|25-13|7|11|20|23|41|-18|
|19|Sestao|38|24-14|7|10|21|29|54|-25|
|20|CE Sabadell FC 1|38|24-14|8|8|22|30|57|-27|

Question: how many clubs had a positive goal difference?
Answer: 10